COMPOUND COOLING FLOW TURBULATOR FOR TURBINE COMPONENT

• US 20110033312A1
• Filed: 09/17/2010
• Published: 02/10/2011
• Est. Priority Date: 08/06/2009
• Status: Active Grant

• Current Assignee: Mikro Systems, Inc., Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Mikro Systems, Inc., Siemens Energy Incorporated (Siemens AG)
• Inventors: Rudolph, Ronald J., Jiang, Nan, Lee, Ching-Pang, Marra, John J.
• Granted Patent: US 8,894,367 B2
• Time in Patent Office: Days
• US Class Current: 416/97.R
• CPC Class Codes: F01D 5/18 Hollow blades, i.e. blades with cooling or heating channels or cavities structure of hollow blades in general F01D5/147; Heating, heat-insulating or cooling means on blades
• CPC Class Codes: F01D 5/187 Convection cooling
• CPC Class Codes: F05D 2250/181 ridged
• CPC Class Codes: F05D 2250/60 Structure; Surface texture
• CPC Class Codes: F05D 2250/611 undulated
• CPC Class Codes: F05D 2250/70 Shape
• CPC Class Codes: F05D 2250/711 convex
• CPC Class Codes: F05D 2250/712 concave
• CPC Class Codes: F05D 2260/2212 by creating turbulence vortex generators, turbulators or the like for mixing F05D2240/127
• CPC Class Codes: F05D 2260/22141 using fins or ribs

Abstract

Multi-scale turbulation features, including first turbulators (46, 48) on a cooling surface (44), and smaller turbulators (52, 54, 58, 62) on the first turbulators. The first turbulators may be formed between larger turbulators (50). The first turbulators may be alternating ridges (46) and valleys (48). The smaller turbulators may be concave surface features such as dimples (62) and grooves (54), and/or convex surface features such as bumps (58) and smaller ridges (52). An embodiment with convex turbulators (52, 58) in the valleys (48) and concave turbulators (54, 62) on the ridges (46) increases the cooling surface area, reduces boundary layer separation, avoids coolant shadowing and stagnation, and reduces component mass.

Claims

1. A turbine component with an interior cooling surface comprising:

a first turbulation feature comprising a first transverse sectional area;

a smaller turbulation feature formed on said first turbulation feature, the smaller turbulation feature comprising a smaller transverse sectional area that is less than ⅓

of the first transverse sectional area.

2. The turbine component of claim 1, wherein the first turbulation feature comprises a ridge, and the smaller turbulation feature comprises a smaller ridge.

3. The turbine component of claim 1, wherein the first turbulation feature comprises a ridge, and the smaller turbulation feature comprises a concave turbulation feature on a top surface of said ridge, and further comprising a smaller convex turbulation feature on a side surface of said ridge.

4. The turbine component of claim 1, wherein the first turbulation feature comprises a ridge, and the smaller turbulation feature comprises a dimple on a top surface of said ridge, and further comprising a smaller bump on a side surface of said ridge.

5. A turbine component with an interior cooling surface comprising:

a first plurality of first convex turbulation features separated by first valleys;

a second plurality of smaller turbulation features formed on each of said first convex turbulation features;

a third plurality of smaller turbulation features formed on said first valleys.

6. The turbine component of claim 5, wherein the second plurality comprises smaller concave turbulation features, and the third plurality comprises smaller convex turbulation features.

7. The turbine component of claim 5, wherein the first plurality comprises parallel first ridges, the second plurality comprises smaller grooves, and the third plurality comprises smaller ridges.

8. The turbine component of claim 5, wherein the first plurality comprises parallel first ridges, the second plurality comprises smaller dimples, and the third plurality comprises smaller bumps.

9. The turbine component of claim 5, further comprising parallel larger ridges on the internal cooling surface, wherein the first convex turbulation features comprise first ridges formed between and parallel to the larger ridges.

10. The turbine component of claim 5, further comprising parallel larger ridges on the internal cooling surface, wherein the first convex turbulation features comprise first ridges formed between and perpendicular to the larger ridges.

11. The turbine component of claim 10, wherein said second plurality of smaller turbulation features comprise dimples and said third plurality of smaller turbulation features comprise bumps.

12. A turbine component with a cooling surface comprising at least one of the group of:

a relatively smaller convex surface feature formed on a relatively larger concave surface feature; and

, a relatively smaller concave surface feature formed on a relatively larger convex surface feature.

13. The turbine component of claim 12 wherein the relatively smaller convex surface feature is formed on the relatively larger concave surface feature and the relatively smaller concave surface feature is formed on the relatively larger convex surface feature.

14. The turbine component of claim 13 wherein the relatively smaller convex surface feature comprises a smaller ridge in a plurality of smaller ridges formed on the relatively larger concave surface feature, and the relatively smaller concave surface feature comprises a smaller groove in a plurality of smaller grooves formed on the relatively larger convex surface feature.

15. The turbine component of claim 13 wherein the relatively smaller convex surface feature comprises a smaller bump in a plurality of smaller bumps formed on the relatively larger concave surface feature, and the relatively smaller concave surface feature comprises a smaller dimple in a plurality of smaller dimples formed on the relatively larger convex surface feature.